Write documentation for iced_core

core/src/length.rs

@@ -1,12 +1,24 @@
 /// The strategy used to fill space in a specific dimension.
 #[derive(Debug, Clone, Copy, PartialEq, Hash)]
 pub enum Length {
+    /// Fill all the remaining space
     Fill,
+
+    /// Fill the least amount of space
     Shrink,
+
+    /// Fill a fixed amount of space
     Units(u16),
 }
 
 impl Length {
+    /// Returns the _fill factor_ of the [`Length`].
+    ///
+    /// The _fill factor_ is a relative unit describing how much of the
+    /// remaining space should be filled when compared to other elements. It
+    /// is only meant to be used by layout engines.
+    ///
+    /// [`Length`]: enum.Length.html
     pub fn fill_factor(&self) -> u16 {
         match self {
             Length::Fill => 1,